犹豫 (yóu yù) is a verb meaning 'to hesitate' or 'to waver' — to feel uncertain or conflicted before making a decision or taking action. Though it looks like a compound of two characters, 犹 and 豫 are not used independently in modern Mandarin with this meaning; together they form an inseparable lexical unit. Historically, both characters originally referred to types of animals (a type of monkey and a large antelope-like creature), and their combination evokes the image of an animal pausing warily — hence the sense of indecision.

This word describes an internal emotional state rather than physical delay. It often appears in contexts involving choices, commitments, or moral dilemmas — for example, hesitating before speaking up, accepting an offer, or acting on one’s conscience. It carries a slightly formal or literary tone and is common in written Chinese and thoughtful spoken discourse, but less frequent in casual, rapid conversation where simpler alternatives like 拿不定主意 may be preferred.